ترجمة - انجليزي-يونانيّ - " Be a better man than your father"

Hi, i saw that sentence in a tv serie called Fringe. In the tv serie they translate that sentence into "na eínai kalýtero ánthropo apó ton patéra sou"
I don't know if t's ancien greek or just greek but someone told me that the translation was wrong ( few grammatical mistakes)
Could you translate it for me ? And do you know if that sentence is a maxim or something like that ?
Thanks